JPS6061617A - Converter for displaying position of angle of engine crankshaft - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a conversion device for indicating the angular position of a mineral engine crankshaft.

In multi-cylinder internal combustion engine fuel injection systems of the type in which fuel is injected directly into the engine cylinders, it is ensured that the fuel is delivered to the engine cylinders at the correct time, i.e. during the compression stroke of the individual cylinders. There is a need to. Fuel injection is performed by changing the state of an electromagnetic device controlled one by one by an electronic control unit. The controller needs to know the position of the engine so that fuel can be delivered by the appropriate nozzle at the correct time.

The disk is moved to half speed of the engine by the engine's camshaft VC.
The transformation means that performs rotation is segmentation. A single mark is provided on this disc so that, for example, when the piston of the first cylinder of the engine is at bottom dead center VC of compressibility 6i M+J, the transducer supplies a signal corresponding to a particular position of the engine. It is known that the transformation @ can be used to detect all passages of the mark.

The housing is provided with other disc transducers S and C which generate multiple signals at equal intervals during the rotation of the engine, which determine the position of the engine with the desired accuracy. The first-mentioned disk, which is in a certain converting means, passes through one further mark to the same number of marks as engine cylinders, and the further one mark is 'H'. positioned in close proximity to one of the other marks and again used as an identification mark.With such an arrangement, when the engine is stopped, the mark that has passed through the conversion winding can be used for the housing or even other marks. This means that the engine must be rotated twice before an accurate indication of the engine position can be obtained. During this time the supply of fuel to the engine is blocked. The cranking time that must be maintained and required before the engine can start is therefore extended compared to mechanical devices.
Ru.

The purpose of the present invention is to provide a simple and convenient shape for mounting Wb.
It is an object of the present invention to provide a converting device for the purpose of the present invention.

According to the present invention, n is mounted on the target conversion device f' loaded with Bd,
a first disc and a first transducer associated with the first disc;

Signals at equal angular spacing between the first row of means on the first disk, the second row of means on the first disk, the second disk and one revolution of the engine? a second transducer associated with a second disc for generating n%, and signal processing means, the first disc being driven by the engine when in use, and the means of the first row being equal to and equal to nine of the engine cylinders; The first transducer generates a signal tone at regular intervals during engine rotation, and the second row of means
Column means arranged alternately with n1 second column means and threads <
The angular IWJ spacing between the means of MS 1 row is not equal, and the I-processing means is 3 in the interval between I-8, which is based on No. 4N and is supplied by the first ``It''. The number of 1H signals generated by the second transducer is compared with stored records to confirm the engine position.

Hereinafter, embodiments of the converting device according to the present invention will be described with reference to the following description.

The converting device t, shown at 2 in FIG. These discs are associated with the twelfth machine and the second transducer 12.13. Disk 10
is driven by the camshaft of the associated engine and therefore rotates at half engine speed in the case of a four-stroke engine. Disc 11 can be driven by a camshaft or an engine crankshaft. When driven by the engine crankshaft, the disk 11 has half the number of teeth 14 formed on its circumferential surface.

Conveniently, transducer 12 is a Hall effect vane sensor and transducer 13 is a magnetoresistive (reluctance) globe. The movement of the vane between the sensing portions of the transducer 12 causes an output 16 to be generated corresponding to the edge of the vane, and the interlocking of C generates an output 1h corresponding to the central edge of the tooth to the transducer 16V ( It's happening.

The disc 10 carries first, second and second rows of means formed in the form of a C-shape, each "means" being formed by the edges of the vanes, and in the example designated by t. It is understood that there are 6 hard vanes and the disc is used in a 6 cylinder engine. The valley vanes have a brown leading edge 15 which forms the first row of means tth. The front lines of the vanes are regularly spaced, in Example 2 at 60° and angularly spaced straight or 7″L.
Wow. Thus, the cut edges 15 generate a series of signals at regular intervals as they pass into the transducer'.

The trailing edge 16 of the vane constitutes the second row of means and it is recognized that the spacing of the trailing edge from the abutting 1+J edge of the vane is unequal T''L. It is convenient to consider the spacing between the front and trailing edge curves of the vanes in relation to the number of signals to be transmitted.
20 teeth is, t, disk 11 is force A l1iii
iCj is driven and the transducer, 13, is supplied by VC (I is processed so that the signal is generated only when the centerline of the mill passes through the transducer, fL/). Therefore, in 1N rotation of the disk 11, 120011 is generated every 60°, represented by 20 signals fL/).

In FIGS. 2&C, there are a total of 201 signals generated by the transducer 13 between the leading edges 15 of the vanes on the disk 10. However, since the vanes are unequally violated, fL
Between the signals which are generated at intervals of 60 degrees, a further series of signals are also generated at intervals which vary depending on the circumference of the vane. From the left end of Figure 2, vane 1 of pond 1
It has a circumferential length equivalent to the five signals from the id disk 11, and the distance between the trailing edge 16 of the vane and the leading edge of the next vane 2 is 1.
Five signals are arranged to be generated by the disk 11. The vane 2 has a circumference such that 11 signals are obtained from the disk 11 before the trailing edge passes the transducer. The 1H pattern between the signals generated by Mil Am of adjacent vanes is unique for a particular vane and therefore determining the position of the engine crankshaft after being rotated through 60° is the bIJ signal. This is possible by comparing the pattern with a stored pattern. This applies to 4 if the crankshaft is rotating in the correct direction. It is reassuring to ensure that the crankshaft is rotating in the correct direction, and to do this the crankshaft must be rotated by at least 60° in embodiments. In this example, the transition between high and low occurs every 600 when the disk 10 and engine are rotating in the correct direction and is generated by the nl'' edge 15 of the vane. If the disc and the engine are rotating in opposite directions, the above mentioned transitions of a lesser extent are due to the so-called trailing edges of the vanes and are greater than or equal to 60° in other cases less than or equal to 60°. spaced by the angle of. therefore,
It is possible to confirm that the engine is rotating in the wrong direction.

In the variant shown in FIG. 6, the vanes of the disc 10 are positioned by teeth 17 positioned to correspond with the front and rear edges of the valley vanes.

The 4H signal supplied by converter 12 occurs at the center point of valley β. FIG. 4 shows in each case the converter 121/(
: Indicates the waveform generated accordingly.

The 1♂ signals supplied by the transducers 12 and 15 are processed in a microprocessor which outputs the 1'IN signals stored in relation to the pulse sequences occurring when the crankshaft is rotating in a static position. be able to. Optionally, a logic circuit, such as a binary comparator, may be used which is capable of determining the pulse pattern for each individual cylinder of the engine.

In one example of a suitable logic circuit, shown in FIG. 5, counter 18 is connected to converter 12,1! via AND gate 19. l
Receive the output of . The count value of the counter before it is reset passes through the transducer 12 and continues through the transducer 16 during the passage of the vane.
represents the number of teeth 14 passing through. The count value is in memory 2
It is supplied to a plurality of binary comparators 21, numbered within zero and equal to the number of engine cylinders, although only six comparators are blanked out in FIG. Each comparator 21 is supplied with a count value stored in memory 20 and also via an input terminal 22 with a count value appropriate for a particular engine cylinder. When the engine is rotating in the correct direction, the output terminal 23VC of the comparator, the identification signal, appears, and these signals appear in the correct sequence.

To detect that the engine is rotating in the correct direction, the output of transducer 16 is connected to its reset input to transducer 12.
A further counter 2 connected to a monostable circuit 25 controlled by a pulse I front provided by
4 F(: 0 applied to the counter 1) between the fronts of the pulse signal supplied by the converter 15
Count the number of pulses generated by 3. If the engine is rotating in the correct direction, this value is constant and in the example is equal to 20. However, if the engine is rotating in the opposite direction, the counter counts the number of pulses generated by the transducer 15 in the interval between the passes of the trailing edge 16 of the vane and this value is never 20.
not equal to The count value of the counter 24 is stored in the memory 26.
is applied to a single binary comparator 27 to which the count value 20 is stored and supplied via an input terminal 28 to it.

If the final count value of the counter 24 is different from 20, the error is recognized by the comparator 27 and an output signal appears at the output terminal 29 indicating reverse rotation of the engine.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a schematic diagram showing the external appearance of two discs forming part of the conversion device, Fig. 2 is a developed view showing the external appearance of one of the above-mentioned discs, and Fig. 5 Figure 4 is a diagram showing the pulses of the signal obtained from a transducer associated with one of the discs; Figure 5 is a block diagram showing the M processing circuit. 0, the reference numeral 10 is the first disk, 11 is the second disk, 12 is the first converter, 13 is the second converter, 14 is the rear, 15 is the means of the first row (front track), 16 1B is a counter, 19 is an AND gate, 20 is a memory, 21 is a comparator, 2.5 is a monostable circuit, 26 is a memory, and 27 is a two-way converter. FIG, I. FIG, 2゜r*c, g. FIG, 4゜Continued from page 10 Inventor Niziel Atria Prudington, United Kingdom 0 Inventor Craig'ψ Ian Pa, United Kingdom ,
- Kins Firth Lagloucestershire, Cirencester, Swifrages Foley 11 Gloucestershire, Cirencester, Sheaey 18

Claims (1)

[Claims] (1) Conversion device V for displaying the angular position of the engine crankshaft
C, a first disc and a 1f linked to the first disc;
a first row of means on a first disc, a second row of means on said first disc, a second row of means on said first disc, and a second disc for generating each issue at equal angular intervals during rotation of the engine. Therefore, it consists of a second converter associated with the second disk, and 1@ processing means m! 311ie the first disc is driven by the engine in use and the means of the first column are equal to the number of engine cylinders and the first transducer generates an ig signal at regular intervals during the rotation of the engine. The means in the second row are rearranged in parallel with the first row of steps, and the angle between the means in the second row and the means in the forward bending first row following it is receiving said 18 lights and supplied by said first consonator 2;
1 The number of signals generated by the second transducer on the previous day in the interval between fC and t of the engine crankshaft, which is compared with the stored records to determine the position of the engine. Conversion device for angular position display. (2) The first disk has a number of vanes t-m equal to the number of engine cylinders, the first row of means consists of the leading edge of the vane, and the second row of means consists of a vane arrangement. Claim 1g characterized in that the trailing edge defines a
The conversion device for displaying the angular position of an engine crankshaft according to item 1. (8) said first disc is a first disc defining said first row of means;
row of teeth 2 and said second row of means 'kl! If you make a second
A conversion device for indicating the angular position of an engine crankshaft having a row of teeth. (4) The processing means No. 11 includes means for responding to a signal t''L generated by the converter for detecting the complete reverse rotation of the engine. A conversion device for displaying the angular position of an engine crankshaft according to item VC.